lowering PH?

How can I lower PH in my indoor garden. I am at around 7.0 and I want to get
to about 5.9 for my tomatoes. I have used aquarium product before but found
it to be expensive. I am not sure what product to use that will not harm my
plants as they are for human consumption...
mon

If you add compost to your garden, the decaying matter will produce
acids. If you work the compost into the soil using a tiller, the soil
will become increasingly sour and chemicals will leach out. Acidic
materials you can add include peat moss, sulfur, or aluminum sulfate.
For your desired pH of 5.9, use 5 pounds of peat moss, 2.5 pounds of
sulfur, or 15 pounds of aluminum sulfate per 100 sq foot of garden
space. It is better to till in the additive than just spread it over
the ground. You'll need less of the additives for sandy soil and
somewhat more for heavy clay soil. Changes in pH do not happen
overnight. Test pH again in 6 months.
I've grown tomatoes for many years and never had concern about pH.
Temperature seems to be more of a problem.

this is an indoor garden as my area is to cool to grow out doors for good
results with my chilies and tomatoes.. I am looking for a way to ph my
water. I am growing in sphagnum peat moss,vermiculite/perlite/worm casting
medium..just want to get my water ph correct for veg and flower.. I do
regular flushing of the pots but I want to know how to ph the water I feed
and flush with.. I heard dolomite lime is 7.0 and you can top dress pots..
and vinegar works but how much to lower from 7.8 to 6.0 .. also I heard
citric acid can work.. any other ideas..
mon
wrote:

I have this information related to lowering pH in a fish pond.
Muriatic acid (31% HCl) a doses of approximately 2 fluid ounces per
1000 gallons per day until you reach the desired pH. The acid
consumes the KH (alkalinity or carbonate hardness, the thing that
stabilizes pH in a fish pond.).
Muriatic acid is used for cleaning concrete and you can buy it in the
building supply section of Lowe's or other hardware type stores for a
few dollars a gallon and that will last you a long time.
Always pour acid into the water. Never pour water into the acid!
Regards,
Hal

Coffee grounds I just put all my coffee grounds in my tomato garden
i noticed a differance in the health of my tomatoes when I use them
as compared to when I don't. and they do slowly raise acid levles in
a garden spot. and my neighbors swear by the ashes from their grill
but I don't have a charcoal grill so I don't know about that .

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